Question

How do you find the value of sec (2pi/3)?

Answer 1

`sec(2pi/3)=sec(pi-pi/3)=-sec(pi/3)=-1/cos(pi/3)=-1/(1/2)=-2`

Explanation:

`sec(2pi/3)=sec(pi-pi/3)=-sec(pi/3)=-1/cos(pi/3)=-1/(1/2)=-2`